Complete the table
Someone help asap ;-;

7x+8y=-18, 4x-9y=-3 solve the system of equations

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

In the following diagram it is given that dec, ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2